clamsheel excavator

例句：

1. 1.The clamshell excavator was used to dig up the seabed for research purposes.
   蛤蜊挖掘机被用来为研究目的挖掘海底。
2. 2. This new model of clamshell excavator is more efficient than its predecessors.
   这款新型的蛤蜊挖掘机比它的前一代更高效。
3. 3.The clamshell excavator has become a popular choice for construction sites due to its durability and ease of use.
   由于其耐用性和易用性，蛤蜊挖掘机已成为建筑工地的热门选择。